Multiple rock-drill



(N0 M0481.) 2 Sheets-Sheet l. C. J. VAN DEPOELE. MULTIPLE ROCK DRILL.

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o. -J. VAN DBPOELB. MULTIPLE ROCK DRILL.

Patented Febll '2.4,' 1891.

NITED STATES l CHARLES J. vAN DEPOELE,

or LYNN, MASSACHUSETTS.

MULTIPLE'RooK-Dmtl..

SPECIFICATION forming part of Letters Patent No. 447,214, dated February 24, 1891. Application filed September 19, 1890. Serial No. 365,544. (No model.)

To @ZZ whom it may concern:

Be it known that T, CHARLES J. VAN DE- POELE, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented'certain new and useful Improvements in Multiple Rock-Drills, of which the following is a description, reference being had to the accompanying drawings,- and to the letters of reference marked thereon.

Myinvention relates to new and useful irnprovements in rock-drills. The principle applies to reciprocating drills, whatever their motive power, but is here shown and will be described in connection with reciprocating electric engines employed to operate drillingtools.

rIhe invention consists, broadly, in con'- neeting together anumber of drilling-engines, so that they may beall placed upon a piece of work and be adj usted however desired, so that, in fact, they might operate in a straight line ora circle oracurve. In fact, according to my invention a group of drilling-engines maybe arranged to put down a series of holes in many different relations to each other.

The invention also comprises a number ot details, as will appear from the following description and the claims.

In the drawings, Figure 1 shows a group of drills connected together and arranged to drill a straight series of holes. Fig. 2 isa detail view of one of the reciprocating drillingengines, showing a desirable form of mounting therefor. Figs. 3, 4, 5, and 6 are top plan views of groups of drilling-engines arranged to cut series of holes on different lines.

As seen in the drawings, Figs. 1 and 2, Ais the body of a drilling-engine, and Bis the tool-carrying rod of the piston, which is reciprocated within the body A by any suitable means. C is a strong metallic band passing around the exterior of the body A, and Within which said body is movable. The band C is provided with lugs d d at opposite sides. The lugs d d are apertured to receive vertically-adjustable legs c e', which are adjusted at desired heights in the apertures inthe lugs d d by suitable set-screws or equivalent means. At right angles to the lugs d d the band C is provided with extensions D. The top edge of the band C is further provided with vertical guide-rods E E, of which two if desired, and said rods E are united at their upper ends by a yoke-plate g, which is formed with a screw-threaded aperture at its central point. A feed-screw F passes through the screw-threaded aperture in the plate g, its lower end engaging the top ofthe head of the body A, while its outer extremity is provided with a hand-wheel G or equivalent means of imparting'rot-ary motion to said feed-screw to move the body A` up or. down within the band C.

As seen in Fig. l, ve drilling-engines are coupled together by screwbolts passing through the lugs or ears D of adjacent engines, and when so coupled a gang of drillingengines will be very securely supported in operative position. By loosening the bolts between the ears D of adjacent engines the engines maybe moved about to take positions with respect to each other which may vary greatly, a few of the changes being indicated in Figs. 4, 5, and 6. p

W'hen a gang of drills is arranged for operation, as pointed out, the lrecoil will be very greatly reduced by adjusting the motive power so that they will strike in alternation. By means of the adjustable connections between each engine the engines maybe, as before stated, arranged on any sort of a curved line while still retaining their tandem connection, and they may even be accommodated to work on uneven surfaces by proper adjustment of the legs e e', the bodies or cylinders A being suitably adjusted by means of their feed-screws. Where it is desired to use one of such engines separately, supplemental legs can ,be attached to the lugs D.

yIn cutting dimension stone ot' various kinds long rows of holes have to be drilled, and for such work an arrangement embodying my invention will be found to greatly facilitate the work. It will be understood that the exact details of feed-screw-supporting band fand guides are not essential to the main features of the invention, and may b e modified in many respects without departing therefrom.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a system of rock-drills, a plurality of only are shown, although more may be used, f

drilling-engines in tandem relation to each other, each engine being' vertically Self-supporting and being laterally supported by its adjacent engine or engines.

2. In a system of roek-drills, a plurality of drilling-engines arranged in tandem relation to each other, a support for each engine, and detachable adjustable connections between the supports of all the engines.

In a system of rock-drills, a plurality of drilling-engines in tandem relation to each other, each engine being vertically self-supporting and being laterally adjustably supported by its adjacent engine or engines.

In testimony whereof I afx my Signatu re in presence of ltwo Witnesses.

CHARLES J. VAN DEPOELE. Vitnesses:

FRANKLAND J ANNUS, K. MCKEE. 

